The instructions indicated that the sauna was thermostatically controlled and would reach temperatures over 180*F (~82*C). It was one of those hot rock heaters you poured water over to make steam.
At the apartment I stayed at in Brisbane! There was a pool, spa (hot tub), and sauna. You had to enter and walk through the ammenities building (toilet/shower/change room) via either the male or female rooms, then it had a door in each section to a combined unisex sauna.
I did the Sauna -> Cold Shower -> Sauna -> Reasonable Shower path. Somewhere around 20-25 minutes each sauna step.